nl80211/cfg80211: Add support to disable CCK rate for management frame

Add a new nl80211 attribute to specify whether to send the management
frames in CCK rate or not. As of now the wpa_supplicant is disabling
CCK rate at P2P init itself. So this patch helps to send P2P probe
request/probe response/action frames being sent at non CCK rate in 2GHz
without disabling 11b rates.

This attribute is used with NL80211_CMD_TRIGGER_SCAN and
NL80211_CMD_FRAME commands to disable CCK rate for management frame
transmission.

Cc: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 13 insertions, 4 deletions

diff --git a/net/wireless/core.h b/net/wireless/core.h
index cb87b8bbceb7..b9ec3061ed72 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -375,7 +375,8 @@ int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
                           struct ieee80211_channel *chan, bool offchan,
                           enum nl80211_channel_type channel_type,
                           bool channel_type_valid, unsigned int wait,
-                          const u8 *buf, size_t len, u64 *cookie);
+                          const u8 *buf, size_t len, bool no_cck,
+                          u64 *cookie);
 
 /* SME */
 int __cfg80211_connect(struct cfg80211_registered_device *rdev,
diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c
index 61adea540e02..21fc9702f81c 100644
--- a/net/wireless/mlme.c
+++ b/net/wireless/mlme.c
@@ -900,7 +900,8 @@ int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
                           struct ieee80211_channel *chan, bool offchan,
                           enum nl80211_channel_type channel_type,
                           bool channel_type_valid, unsigned int wait,
-                          const u8 *buf, size_t len, u64 *cookie)
+                          const u8 *buf, size_t len, bool no_cck,
+                          u64 *cookie)
 {
         struct wireless_dev *wdev = dev->ieee80211_ptr;
         const struct ieee80211_mgmt *mgmt;
@@ -991,7 +992,7 @@ int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
         /* Transmit the Action frame as requested by user space */
         return rdev->ops->mgmt_tx(&rdev->wiphy, dev, chan, offchan,
                                   channel_type, channel_type_valid,
-                                  wait, buf, len, cookie);
+                                  wait, buf, len, no_cck, cookie);
 }
 
 bool cfg80211_rx_mgmt(struct net_device *dev, int freq, const u8 *buf,
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index a3e26951fd8b..48c1bf1a142d 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -191,6 +191,7 @@ static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
                                          .len = IEEE80211_MAX_DATA_LEN },
         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
+        [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 };
 
 /* policy for the key attributes */
@@ -3620,6 +3621,9 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
                 }
         }
 
+        request->no_cck =
+                nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
+
         request->dev = dev;
         request->wiphy = &rdev->wiphy;
 
@@ -5171,6 +5175,7 @@ static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
         struct sk_buff *msg;
         unsigned int wait = 0;
         bool offchan;
+        bool no_cck;
 
         if (!info->attrs[NL80211_ATTR_FRAME] ||
             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
@@ -5207,6 +5212,8 @@ static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
 
         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
 
+        no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
+
         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
         chan = rdev_freq_to_chan(rdev, freq, channel_type);
         if (chan == NULL)
@@ -5227,7 +5234,7 @@ static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
                                     channel_type_valid, wait,
                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
-                                    &cookie);
+                                    no_cck, &cookie);
         if (err)
                 goto free_msg;